US20060141931A1 - Method for exchanging data between field devices - Google Patents

Method for exchanging data between field devices Download PDF

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Publication number
US20060141931A1
US20060141931A1 US10/528,143 US52814305A US2006141931A1 US 20060141931 A1 US20060141931 A1 US 20060141931A1 US 52814305 A US52814305 A US 52814305A US 2006141931 A1 US2006141931 A1 US 2006141931A1
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Prior art keywords
field devices
data
fieldbus
exchange
radio unit
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US10/528,143
Inventor
Eugenio Da Silva Neto
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Endress and Hauser Process Solutions AG
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Endress and Hauser Process Solutions AG
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Assigned to ENDRESS + HAUSER PROCESS SOLUTIONS reassignment ENDRESS + HAUSER PROCESS SOLUTIONS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DA SILVA NETO, EUGENIO FERREIRA
Publication of US20060141931A1 publication Critical patent/US20060141931A1/en
Abandoned legal-status Critical Current

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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423—Input/output
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25081—Clone, copy configuration from first device, in teach mode, to second identical device
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25186—Bluetooth
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/31—From computer integrated manufacturing till monitoring
    • G05B2219/31251—Redundant access, wireless and hardware access to fielddevices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Definitions

  • the invention relates to a method for data exchange between field devices, as defined in the preamble of claim 1 .
  • field devices which serve for registering and/or influencing process variables.
  • field devices are fill level measuring devices, mass flowmeters, pressure meters, temperature meters, etc., which, as sensors, register the corresponding process variables fill level, flow rate, pressure, and temperature, respectively.
  • actuators which, e.g. as valves, influence flow rate of a liquid in a section of pipeline.
  • the field devices are, as a rule, connected with a central control unit, which controls and/or monitors total process flow.
  • a central control unit which controls and/or monitors total process flow.
  • the measured values of the various sensors are evaluated and the appropriate actuators activated for influencing the process.
  • Data transmission between the field devices and the control unit occurs according to known international standards for fieldbusses, such as e.g. HART®, Foundation Fieldbus®, Profibus®, CAN-Bus®, etc.
  • fieldbusses such as e.g. HART®, Foundation Fieldbus®, Profibus®, CAN-Bus®, etc.
  • process control also configuring and parametering of the field devices is done from a control unit.
  • U.S. Pat. No. 5,793,963 discloses a method for data exchange between a control unit and a field device. The method includes transmission of data both via the fieldbus and via radio waves.
  • An object of the present invention is to provide a method for data exchange between field devices lacking the aforementioned disadvantages while being especially simple and cost-favorable to put into practice and enabling a fast data exchange.
  • An essential idea of the method is to provide, besides the data exchange via the data bus, a radio connection between the field devices.
  • a simple embodiment of the radio connection is based on the Bluetooth standard. In this way, standard components can simply be placed in the field devices.
  • the field devices exchange data on process conditions and an evaluation of the state of the process occurs.
  • configuration and parametering data are exchanged between the field devices. In this way, the properties of two field devices can easily be made the same.
  • FIG. 1 a schematic drawing of a fieldbus with multiple field devices
  • FIG. 2 a schematic drawing of a field device designed for the method of the invention.
  • a fill level measuring device S 1 is shown in greater detail arranged on a tank T.
  • the fill level measuring device S 1 measures the fill height H in the tank T by means of a radar travel-time method.
  • a radar pulse is sent from the fill level measuring device S 1 in the direction of the surface of the liquid L and the radar pulse reflected from the surface is registered. Using the travel time of the radar pulses, the height H of the liquid is determined.
  • the fill level measuring device S 1 is connected via a fieldbus FB with a process control system PCS, which serves as central control unit.
  • the fill level measuring device S 1 and the process control system PCS can communicate with one another via the fieldbus FB using known standards. As a rule, the current measured values of the fill level measuring device S 1 are transmitted to the process control system and evaluated there and the appropriate actuators activated.
  • actuators A 1 , A 2 Connected to the fieldbus are, by way of example, additional sensors S 2 , S 3 and actuators A 1 , A 2 . With the help of these sensors S 2 , S 3 , other process variables are measured, and, with the help of the actuators A 1 , A 2 , influenced.
  • Each of the two actuators A 1 and A 2 has its own radio unit, so that actuators A 1 and A 2 can also exchange data by radio wave transmission.
  • FIG. 2 is a schematic illustration of a field device F.
  • the field device includes a microprocessor ⁇ P and a memory E.
  • the microprocessor ⁇ P is connected via an analog/digital converter A/D with a measured-value pickup MV.
  • the measured-value pickup MV serves for measuring a process variable, e.g. the fill level H.
  • the field devices S 1 , S 2 , S 3 , A 1 , A 2 exchange data both with the control system PCS and with one another.
  • the microprocessor up is connected with the fieldbus FB. Additionally, the microprocessor ⁇ P is connected with a radio unit RU and a display/operating unit DO. In advantageous manner, the display/operating unit DO and the radio unit RU are provided as a plug-in unit PIU indicated by the dashed box.
  • radio unit RU If two field devices each have a radio unit RU, then these field devices can exchange data not only over the fieldbus FB, but also via radio wave transmission.
  • An essential advantage of data transmission by radio is that data transmission can occur significantly faster between the field devices than is the case via the fieldbus, which, as a rule, enables only a relatively slow data exchange.
  • a further advantage is that data transmission by radio is not limited by the rules of protocol of the data bus being used.
  • the radio unit works according to the Bluetooth standard.
  • Bluetooth components are available on the market at favorable cost and are suited for short-range radio connection in near distances of up to 5 m.
  • the configuring and parametering of the replacement device can be omitted in simple manner by exchanging the configuring and parametering data between the two field devices by radio wave transmission.
  • the field devices can exchange process conditions, process data, diagnosis data, etc. via the radio connection and evaluate these in a field device having greater storage capabilities. In this way, a safe determining of the state of the process is possible independently of the data transmission over the fieldbus FB.
  • Running in the field devices are special software programs, which are also referred to as firmware. Sometimes for this, it is necessary to adapt the firmware in the field devices by software updates.
  • Software updates can, in simple manner, be sent via the data bus to a special field device. This field device then transmits the updates to other field devices by radio wave transmission. In this way, the loading of the data bus FB is significantly lessened.
  • the operating of a field device can be done from another field device via the radio connection between the two field devices.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Quality & Reliability (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)

Abstract

A method for exchanging data between field devices used in automation technology. The method permits data exchange via radio waves in addition to a data exchange via a field bus. This permits a more rapid data exchange, which is not restricted by the protocol control of the field bus.

Description

  • The invention relates to a method for data exchange between field devices, as defined in the preamble of claim 1.
  • Frequently applied in process automation technology are field devices, which serve for registering and/or influencing process variables. Examples of such field devices are fill level measuring devices, mass flowmeters, pressure meters, temperature meters, etc., which, as sensors, register the corresponding process variables fill level, flow rate, pressure, and temperature, respectively.
  • Serving for influencing process variables are the so-called actuators, which, e.g. as valves, influence flow rate of a liquid in a section of pipeline.
  • The field devices are, as a rule, connected with a central control unit, which controls and/or monitors total process flow. In the central control unit, the measured values of the various sensors are evaluated and the appropriate actuators activated for influencing the process.
  • Data transmission between the field devices and the control unit occurs according to known international standards for fieldbusses, such as e.g. HART®, Foundation Fieldbus®, Profibus®, CAN-Bus®, etc. Besides process control, also configuring and parametering of the field devices is done from a control unit.
  • U.S. Pat. No. 5,793,963 discloses a method for data exchange between a control unit and a field device. The method includes transmission of data both via the fieldbus and via radio waves.
  • Recently, also a direct data exchange between field devices has become possible over the data bus. This data exchange between field devices via the data bus is, however, relatively slow and is limited considerably by protocol rules.
  • An object of the present invention is to provide a method for data exchange between field devices lacking the aforementioned disadvantages while being especially simple and cost-favorable to put into practice and enabling a fast data exchange.
  • This object is achieved by the method defined in claim 1.
  • An essential idea of the method is to provide, besides the data exchange via the data bus, a radio connection between the field devices.
  • Via this radio connection, a fast data exchange can occur between the field devices.
  • Advantageous further developments of the invention are presented in the dependent claims.
  • A simple embodiment of the radio connection is based on the Bluetooth standard. In this way, standard components can simply be placed in the field devices.
  • In a further development, the field devices exchange data on process conditions and an evaluation of the state of the process occurs. In a further development, configuration and parametering data are exchanged between the field devices. In this way, the properties of two field devices can easily be made the same.
  • The invention will now be explained in greater detail on the basis of an embodiment illustrated in the drawing, the figures of which show as follows:
  • FIG. 1 a schematic drawing of a fieldbus with multiple field devices; and
  • FIG. 2 a schematic drawing of a field device designed for the method of the invention.
  • In FIG. 1, by way of an example of a field device, a fill level measuring device S1 is shown in greater detail arranged on a tank T. The fill level measuring device S1 measures the fill height H in the tank T by means of a radar travel-time method. In such case, a radar pulse is sent from the fill level measuring device S1 in the direction of the surface of the liquid L and the radar pulse reflected from the surface is registered. Using the travel time of the radar pulses, the height H of the liquid is determined.
  • The fill level measuring device S1 is connected via a fieldbus FB with a process control system PCS, which serves as central control unit. The fill level measuring device S1 and the process control system PCS can communicate with one another via the fieldbus FB using known standards. As a rule, the current measured values of the fill level measuring device S1 are transmitted to the process control system and evaluated there and the appropriate actuators activated.
  • Connected to the fieldbus are, by way of example, additional sensors S2, S3 and actuators A1, A2. With the help of these sensors S2, S3, other process variables are measured, and, with the help of the actuators A1, A2, influenced. Each of the two actuators A1 and A2 has its own radio unit, so that actuators A1 and A2 can also exchange data by radio wave transmission.
  • FIG. 2 is a schematic illustration of a field device F. The field device includes a microprocessor μP and a memory E. The microprocessor μP is connected via an analog/digital converter A/D with a measured-value pickup MV. The measured-value pickup MV serves for measuring a process variable, e.g. the fill level H.
  • The field devices S1, S2, S3, A1, A2 exchange data both with the control system PCS and with one another.
  • Via a fieldbus interface FBI, the microprocessor up is connected with the fieldbus FB. Additionally, the microprocessor μP is connected with a radio unit RU and a display/operating unit DO. In advantageous manner, the display/operating unit DO and the radio unit RU are provided as a plug-in unit PIU indicated by the dashed box.
  • The method of the invention will now be explained in greater detail.
  • If two field devices each have a radio unit RU, then these field devices can exchange data not only over the fieldbus FB, but also via radio wave transmission. An essential advantage of data transmission by radio is that data transmission can occur significantly faster between the field devices than is the case via the fieldbus, which, as a rule, enables only a relatively slow data exchange.
  • A further advantage is that data transmission by radio is not limited by the rules of protocol of the data bus being used.
  • Advantageously, the radio unit works according to the Bluetooth standard. Bluetooth components are available on the market at favorable cost and are suited for short-range radio connection in near distances of up to 5 m.
  • If a malfunctioning field device has to be replaced, the configuring and parametering of the replacement device can be omitted in simple manner by exchanging the configuring and parametering data between the two field devices by radio wave transmission.
  • Following the data transmission, there are then two field devices present having identical properties. This can be referred to as the “cloning” of field devices.
  • Furthermore, the field devices can exchange process conditions, process data, diagnosis data, etc. via the radio connection and evaluate these in a field device having greater storage capabilities. In this way, a safe determining of the state of the process is possible independently of the data transmission over the fieldbus FB.
  • Running in the field devices are special software programs, which are also referred to as firmware. Sometimes for this, it is necessary to adapt the firmware in the field devices by software updates.
  • Software updates can, in simple manner, be sent via the data bus to a special field device. This field device then transmits the updates to other field devices by radio wave transmission. In this way, the loading of the data bus FB is significantly lessened.
  • Also the operating of a field device can be done from another field device via the radio connection between the two field devices.

Claims (7)

1-6. (canceled)
7. A method for data exchange between field devices of automation technology, comprising the steps of: providing the field devices with a fieldbus interface for connecting with a fieldbus; providing a radio unit; and
exchanging data between the field devices and the radio unit utilizing radio wave transmission.
8. The method as claimed in claim 7, wherein:
the radio unit works according to the Bluetooth standard.
9. The method as claimed in claim 7, wherein:
the field devices exchange data concerning process conditions and an evaluation of the state of the process occurs.
10. The method as claimed in claim 7, wherein:
the field devices exchange configuring and parametering data.
11. The method as claimed in claim 7, wherein:
the field devices exchange software updates.
12. A field device for use providing the field devices with a fieldbus interface for connecting with a fieldbus; providing a radio unit; and exchanging data between the field devices and the radio unit utilizing radio wave transmission, wherein: the radio unit and a display/operating unit form an exchangeable unit.
US10/528,143 2002-09-19 2003-09-09 Method for exchanging data between field devices Abandoned US20060141931A1 (en)

Applications Claiming Priority (3)

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DE10243619A DE10243619A1 (en) 2002-09-19 2002-09-19 Method for data exchange between field devices
DE10243619.3 2002-09-19
PCT/EP2003/010010 WO2004029895A2 (en) 2002-09-19 2003-09-09 Method for exchanging data between field devices

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WO (1) WO2004029895A2 (en)

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US20060217904A1 (en) * 1999-12-17 2006-09-28 Herbert Auber Fill level measurement device
EP2811173A1 (en) 2013-06-04 2014-12-10 Danfoss Power Solutions Aps A hydraulic system and a method for operating a hydraulic system
CN104301007A (en) * 2013-07-17 2015-01-21 横河电机株式会社 Field devices and communication system
US20160110557A1 (en) * 2013-05-29 2016-04-21 Weidmüller Interface GmbH & Co. KG Base module for electronic device
US9990363B2 (en) 2014-11-25 2018-06-05 Emerson Process Management, Valve Automation, Inc. Methods and apparatus of using customizable templates in initializing process control devices
WO2021081163A1 (en) 2019-10-22 2021-04-29 Hayward Industries, Inc. Modular wiring system for actuators

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DE102004048766A1 (en) * 2004-10-05 2006-04-06 Endress + Hauser Process Solutions Ag Fieldbus application with several field devices
DE102004052488A1 (en) * 2004-10-28 2006-05-24 Endress + Hauser Process Solutions Ag Method for operating a field device of automation technology
DE102004055308A1 (en) * 2004-11-16 2006-05-18 Endress + Hauser Flowtec Ag Radio unit for a field device of automation technology
DE102004057005A1 (en) * 2004-11-25 2006-06-08 Siemens Ag Automatic, secure identification and parameterization of coupled automation components via short-range communication
DE102006009979A1 (en) * 2006-03-03 2007-09-06 Siemens Ag Wireless communication device for use in automation network, has field device providing necessary operation energy at preset operating time by energy management unit, where operation energy of field device is stopped at preset idle time
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US20060217904A1 (en) * 1999-12-17 2006-09-28 Herbert Auber Fill level measurement device
US20160110557A1 (en) * 2013-05-29 2016-04-21 Weidmüller Interface GmbH & Co. KG Base module for electronic device
US20180223883A1 (en) * 2013-06-04 2018-08-09 Danfoss Power Solutions Aps Hydraulic system and a method for operating a hydraulic system
US20160069363A1 (en) * 2013-06-04 2016-03-10 Danfoss Power Solutions Aps A hydraulic system and method for operating a hydraulic system
US10036409B2 (en) * 2013-06-04 2018-07-31 Danfoss Power Solutions Aps Hydraulic system and method for operating a hydraulic system
EP2811173A1 (en) 2013-06-04 2014-12-10 Danfoss Power Solutions Aps A hydraulic system and a method for operating a hydraulic system
US10670055B2 (en) * 2013-06-04 2020-06-02 Danfoss Power Solutions Aps Hydraulic system and a method for operating a hydraulic system
JP2015022416A (en) * 2013-07-17 2015-02-02 横河電機株式会社 Field apparatus and communication system
CN104301007A (en) * 2013-07-17 2015-01-21 横河电机株式会社 Field devices and communication system
US9990363B2 (en) 2014-11-25 2018-06-05 Emerson Process Management, Valve Automation, Inc. Methods and apparatus of using customizable templates in initializing process control devices
WO2021081163A1 (en) 2019-10-22 2021-04-29 Hayward Industries, Inc. Modular wiring system for actuators
EP4049100A4 (en) * 2019-10-22 2023-11-22 Hayward Industries, Inc. Modular wiring system for actuators
US11849541B2 (en) 2019-10-22 2023-12-19 Hayward Industries, Inc. Modular wiring system for actuators

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AU2003266370A8 (en) 2004-04-19
EP1540434A2 (en) 2005-06-15
DE10243619A1 (en) 2004-04-01
WO2004029895A3 (en) 2004-10-21
AU2003266370A1 (en) 2004-04-19
WO2004029895A2 (en) 2004-04-08

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